"JESUS, MARY AND DA VINCI" is a television special inspired by The Da Vinci Code and evidently it suggests that Jesus was married to Mary Magdalene and that perhaps they had childred. I have already discussed this idea here and here. The only thing I can think of to add is that even if Jesus was married, I think it's very unlikely he had any childred, at least who lived to adulthood. The early Jesus movement was interested in the family of Jesus and preserved quite a few traditions about them. I can't imagine that they wouldn't have kept track of the careers of Jesus' children if he had any. For more on the family of Jesus, see my colleague Richard Bauckham's book Jude and the Relatives of Jesus in the Early Church.

UPDATE: Here's more on the show from the New York Times and the Washington Times. Granted, I haven't seen it, but it doesn't sound very credible.